[exec]

<script src="http://jqueryjs.googlecode.com/files/jquery-1.2.6.min.js" type="text/javascript"></script>

<div id="area">
<input type="checkbox" /> <label>1</label>
<input type="checkbox" /> <label>2</label>
<input type="checkbox" /> <label>3</label>
<input type="checkbox" /> <label>4</label>
<input type="checkbox" /> <label>5</label>
<input type="checkbox" /> <label>6</label>
<input type="checkbox" /> <label>7</label>
<input type="checkbox" /> <label>8</label>
<input type="checkbox" /> <label>9</label>
</div>

<div id="clones">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>

<script type="text/javascript">
$('#area input:checkbox').each(function (i, g) {
	this.onchange = function () {
		if (this.checked) {
			$('#clones span').eq(i).html($(g).next().clone());
		} else {
			$('#clones span').eq(i).empty();
		}
	}
});
</script>